/**
  ******************************************************************************
  * @file    FMC/FMC_NOR/Src/main.c
  * @author  MCD Application Team
  * @brief   This example describes how to configure and use GPIOs through
  *          the STM32F7xx HAL API.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/** @addtogroup STM32F7xx_HAL_Examples
  * @{
  */

/** @addtogroup FMC_NOR
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define BUFFER_SIZE         ((uint32_t)0x1000)
#define WRITE_READ_ADDR     ((uint32_t)0x0800)

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
NOR_HandleTypeDef hnor;
FMC_NORSRAM_TimingTypeDef NOR_Timing;


/* Read/Write Buffers */
uint16_t aTxBuffer[BUFFER_SIZE];
uint16_t aRxBuffer[BUFFER_SIZE];

/* Status variables */
__IO uint32_t uwWriteReadStatus = 0;

/* Counter index */
uint32_t uwIndex = 0;

/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
static void Error_Handler(void);
static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLenght, uint16_t uwOffset);
static TestStatus Buffercmp(uint16_t *pBuffer1, uint16_t *pBuffer2, uint16_t BufferLength);
static void CPU_CACHE_Enable(void);
static void MPU_ConfigNOR(void);

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /* Set MPU NOR region */
  MPU_ConfigNOR();

  /* Enable the CPU Cache */
  CPU_CACHE_Enable();
	
  /* STM32F7xx HAL library initialization:
       - Configure the Flash ART accelerator on ITCM interface
       - Systick timer is configured by default as source of time base, but user 
         can eventually implement his proper time base source (a general purpose 
         timer for example or other time source), keeping in mind that Time base 
         duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 
         handled in milliseconds basis.
       - Set NVIC Group Priority to 4
       - Low Level Initialization
     */
  HAL_Init();

  /* Configure the system clock to 216 MHz */
  SystemClock_Config();
  
  /* Configure LED1 and LED3 */
  BSP_LED_Init(LED1);
  BSP_LED_Init(LED3);

  /*##-1- Configure the NOR device ##########################################*/
  /* NOR device configuration */

  hnor.Instance  = FMC_NORSRAM_DEVICE;
  hnor.Extended  = FMC_NORSRAM_EXTENDED_DEVICE;

  NOR_Timing.AddressSetupTime      = 4;
  NOR_Timing.AddressHoldTime       = 3;
  NOR_Timing.DataSetupTime         = 8;
  NOR_Timing.BusTurnAroundDuration = 1;
  NOR_Timing.CLKDivision           = 2;
  NOR_Timing.DataLatency           = 2;
  NOR_Timing.AccessMode            = FMC_ACCESS_MODE_A;
  
  hnor.Init.NSBank             = FMC_NORSRAM_BANK1;
  hnor.Init.DataAddressMux     = FMC_DATA_ADDRESS_MUX_DISABLE;
  hnor.Init.MemoryType         = FMC_MEMORY_TYPE_NOR;
  hnor.Init.MemoryDataWidth    = NOR_MEMORY_WIDTH;
  hnor.Init.BurstAccessMode    = FMC_BURST_ACCESS_MODE_DISABLE;
  hnor.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_LOW;
  hnor.Init.WaitSignalActive   = FMC_WAIT_TIMING_BEFORE_WS;
  hnor.Init.WriteOperation     = FMC_WRITE_OPERATION_ENABLE;
  hnor.Init.WaitSignal         = FMC_WAIT_SIGNAL_ENABLE;
  hnor.Init.ExtendedMode       = FMC_EXTENDED_MODE_DISABLE;
  hnor.Init.AsynchronousWait   = FMC_ASYNCHRONOUS_WAIT_ENABLE;
  hnor.Init.WriteBurst         = FMC_WRITE_BURST_DISABLE;
  hnor.Init.ContinuousClock    = NOR_CONTINUOUS_CLOCK;

  /* Initialize the NOR controller */
  if(HAL_NOR_Init(&hnor, &NOR_Timing, &NOR_Timing) != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler();
  }

  /*##-2- NOR memory read/write access ######################################*/
  /* Fill the buffer to write */
  Fill_Buffer(aTxBuffer, BUFFER_SIZE, 0xD20F);

  /* Erase block */
  HAL_NOR_Erase_Block(&hnor, WRITE_READ_ADDR, NOR_BANK_ADDR);

  /* Wait until NOR is ready */
  if(HAL_NOR_GetStatus(&hnor, NOR_BANK_ADDR, ERASE_TIMEOUT) != HAL_NOR_STATUS_SUCCESS)
  {
    return HAL_NOR_STATUS_ERROR;
  }

  /* Write data to the NOR memory */
  for (uwIndex = 0; uwIndex < BUFFER_SIZE; uwIndex++)
  {
    /* Write data to NOR */
    HAL_NOR_Program(&hnor, (uint32_t *)(NOR_BANK_ADDR + WRITE_READ_ADDR + 2*uwIndex), &aTxBuffer[uwIndex]);

    /* Read NOR device status */
    if(HAL_NOR_GetStatus(&hnor, NOR_BANK_ADDR, PROGRAM_TIMEOUT) != HAL_NOR_STATUS_SUCCESS)
    {
      return HAL_NOR_STATUS_ERROR;
    }
  }

  /* Read back data from the NOR memory */
  if(HAL_NOR_ReadBuffer(&hnor, NOR_BANK_ADDR + WRITE_READ_ADDR, &aRxBuffer[0], BUFFER_SIZE) != HAL_OK)
  {
    return HAL_ERROR;
  }

  /*##-3- Checking data integrity ############################################*/
  uwWriteReadStatus = Buffercmp(aTxBuffer, aRxBuffer, BUFFER_SIZE);
  
  if (uwWriteReadStatus != PASSED)
  {
    /* KO */
    /* Toggle LED3 */
    while(1)
    {
      BSP_LED_Toggle(LED3);
    }
  }
  else
  {
    /* OK */
    /* Turn on LED1 */
    BSP_LED_On(LED1);
  }

  /* Infinite loop */
  while (1)
  {
  }
}

/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow : 
  *            System Clock source            = PLL (HSE)
  *            SYSCLK(Hz)                     = 216000000
  *            HCLK(Hz)                       = 216000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 4
  *            APB2 Prescaler                 = 2
  *            HSE Frequency(Hz)              = 25000000
  *            PLL_M                          = 25
  *            PLL_N                          = 432
  *            PLL_P                          = 2
  *            PLL_Q                          = 9
  *            PLL_R                          = 7
  *            VDD(V)                         = 3.3
  *            Main regulator output voltage  = Scale1 mode
  *            Flash Latency(WS)              = 7
  * @param  None
  * @retval None
  */
static void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;
  HAL_StatusTypeDef  ret = HAL_OK;
  
  /* Enable Power Control clock */
  __HAL_RCC_PWR_CLK_ENABLE();
  
  /* The voltage scaling allows optimizing the power consumption when the device is 
     clocked below the maximum system frequency, to update the voltage scaling value 
     regarding system frequency refer to product datasheet.  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  /* Enable HSE Oscillator and activate PLL with HSE as source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 432;  
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 9;
  RCC_OscInitStruct.PLL.PLLR = 7;
  
  ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
  if(ret != HAL_OK)
  {
    while(1) { ; }
  }
  
  /* Activate the OverDrive to reach the 216 MHz Frequency */  
  ret = HAL_PWREx_EnableOverDrive();
  if(ret != HAL_OK)
  {
    while(1) { ; }
  }
  
  /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;  
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; 
  
  ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7);
  if(ret != HAL_OK)
  {
    while(1) { ; }
  }  
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
static void Error_Handler(void)
{
  /* User may add here some code to deal with this error */
  /* Turn LED3 on */
  BSP_LED_On(LED3);
  while(1)
  {
  }
}

/**
  * @brief  Fills buffer with user predefined data.
  * @param  pBuffer: pointer on the buffer to fill
  * @param  uwBufferLenght: size of the buffer to fill
  * @param  uwOffset: first value to fill on the buffer
  * @retval None
  */
static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLenght, uint16_t uwOffset)
{
  uint16_t tmpIndex = 0;

  /* Put in global buffer different values */
  for (tmpIndex = 0; tmpIndex < uwBufferLenght; tmpIndex++ )
  {
    pBuffer[tmpIndex] = tmpIndex + uwOffset;
  }
}

/**
  * @brief  Compares two buffers.
  * @param  pBuffer1, pBuffer2: buffers to be compared.
  * @param  BufferLength: buffer's length
  * @retval PASSED: pBuffer identical to pBuffer1
  *         FAILED: pBuffer differs from pBuffer1
  */
static TestStatus Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
{
  while (BufferLength--)
  {
    if (*pBuffer1 != *pBuffer2)
    {
      return FAILED;
    }

    pBuffer1++;
    pBuffer2++;
  }

  return PASSED;
}

/**
  * @brief  CPU L1-Cache enable.
  * @param  None
  * @retval None
  */
static void CPU_CACHE_Enable(void)
{
  /* Enable I-Cache */
  SCB_EnableICache();

  /* Enable D-Cache */
  SCB_EnableDCache();
}


/**
  * @brief  Configure the MPU attributes as device for NOR.
  * @note   The Base Address is 0x60000000.
  *         The Region Size is 16MBytes, it is related to NOR memory size.
  * @param  None
  * @retval None
  */
static void MPU_ConfigNOR(void)
{
  MPU_Region_InitTypeDef MPU_InitStruct;
  
  /* Disable the MPU */
  HAL_MPU_Disable();
  
  /* Configure the MPU as Strongly ordered for not defined regions */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x00;
  MPU_InitStruct.Size = MPU_REGION_SIZE_4GB;
  MPU_InitStruct.AccessPermission = MPU_REGION_NO_ACCESS;
  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
  MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER0;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
  MPU_InitStruct.SubRegionDisable = 0x87;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;

  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* Configure the MPU attributes as device for NOR */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x60000000;
  MPU_InitStruct.Size = MPU_REGION_SIZE_16MB;
  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
  MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
  MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER1;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
  MPU_InitStruct.SubRegionDisable = 0x00;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;

  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* Configure the MPU attributes QSPI control registers */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0xA0000000;
  MPU_InitStruct.Size = MPU_REGION_SIZE_8KB;
  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
  MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
  MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER2;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
  MPU_InitStruct.SubRegionDisable = 0x0;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
  
  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* Enable the MPU */
  HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
}

#ifdef  USE_FULL_ASSERT

/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/**
  * @}
  */

/**
  * @}
  */

